About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Properties of Cast Metals
|
Presentation Title |
Modification of Al-Si Alloys with Rare Earth Elements |
Author(s) |
Prakash Srirangam |
On-Site Speaker (Planned) |
Prakash Srirangam |
Abstract Scope |
Aluminium-Silicon (Al-Si) alloys are widely used in the automotive, aerospace and casting industries due to their excellent mechanical and performance properties. Modifying elements such as strontium or rare earth elements (RE) such as yttrium and cerium are added to these alloys to transform the plate-like silicon morphology to fibrous morphology. In this study, Al-Si alloys were modified with strontium, yttrium and cerium and these cast alloys were characterised by using SEM, TEM and 3D X-ray Computed Tomography (XCT). Results show that the addition of strontium resulted in an increase in porosity as compared to yttrium and cerium additions in Al-Si alloys. It was observed that the addition of strontium fully modified the eutectic silicon, while yttrium and cerium only partially modified the eutectic silicon phase in these alloys. These results along with the quantified information on porosity and intermetallic particles formation in modified Al-Si alloys will be presented. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |